Consider the following statements: The energy band gap of

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Consider the following statements:
The energy band gap of GaAs
1. is indirect.
2. is direct.
3. is 1.43 eV.
4. corresponds to wavelength of 0·89 µm.
(Given h = 6.63 × 10– 34 joule-sec)
Of these the correct statements is/are:

1. 1 alone
2. 2, 3 and 4
3. 2 and 3
4. 1 and 4

Correct Option: B

NA